HVAC · Practice-Exam-2 · Problem 8PDFSolution in PDF ↓
HVAC · Practice-Exam-2 · Problem 8
Problem & Solution
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Problem: A heat recovery ventilator is used to preheat 30 degree 40% RH outside air with 75 degree 50% RH exhaust air.
Key step: A heat recovery ventilator is used to preheat 30 degree 40% RH outside air with 75 degree 50% RH exhaust air.
Watch out: And we distinguish that from energy recovery which has the ability to not only transfer heat in terms of sensible heat but also latent heat.
Result: That would just be little Q equals big Q dot over m dot, which is just Cp delta t.
✅ Answer: B
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